ursa_info: Print metadata for raster image.

In nplatonov/ursa: Non-Interactive Spatial Tools for Raster Processing and Visualization

Print metadata for raster image.

Description

Function shows information about raster CRS, data type, storage mode, nodata value, structure of band names.

Usage

ursa_info(obj, detail = NA, ...)

Arguments

obj	ursaRaster object
detail	Not used. Reserved for potential detail levels
...	Arguments, which are passed to str.

Details

ursa_info generates a list and then shows structure of this list via function str.

Value

Object of temporal class ursaMetadata is a list with items:

columns	Number of columns (samples)
rows	Number of rows (lines)
resx	Grid cell size by horizontal axis
resy	Grid cell size by vertical axis
minx	Left margin of boundary box
maxx	Right margin of boundary box
miny	Bottom margin of boundary box
maxy	Top margin of boundary box
proj4	PROJ.4 string
nodata	Optional. Value, which is interpreted as NA
datatype	Optional. If data are on disk, then integer code of data type.
interleave	Optional. If data are on disk, then abbreviation of bands interleave.
mode	Character of length 2: storage mode and class of value. If data has not been read, then class is "logical". If data is not in memory, then storage mode is "raw".
bandname	Band names.
colortable	Optional. Structure of color table.

Function returns NULL.

Author(s)

Nikita Platonov [e-mail]

See Also

str
print.ursaRaster

Examples

session_grid(NULL)
a <- as.integer(round(ursa_dummy(nband=3)))

print(a) ## print data
ursa_info(a,digits=1) ## print metadata

fname <- tempfile()
write_envi(a,fname,compress=FALSE)
b1 <- open_envi(fname)
ursa_info(b1)
close(b1)
b2 <- read_envi(fname)
ursa_info(b2)

# print ENVI header
sapply(c(" -------------- begin --------------",readLines(paste0(fname,".hdr"))
        ," --------------- end ---------------"),message)

envi_remove(fname)

nplatonov/ursa documentation built on May 8, 2024, 6:02 p.m.